Question

我正在尝试管理通知，但是当应用程序处于前台时，我无法对其进行任何操作。

将应用最小化或完全关闭时，通知会正确显示，但是如果应用位于前台，则看不到该通知。

我对此代码进行了测试，但是没有任何效果。关闭或最小化应用程序的通知无需修改此代码或完全修改此代码即可：

（在注释指示后进行编辑，结果相同）

import android.app.Notification
import android.app.NotificationManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.os.Looper
import android.util.Log
import androidx.appcompat.app.AlertDialog
import androidx.core.app.NotificationCompat
import com.google.firebase.messaging.FirebaseMessagingService
import com.google.firebase.messaging.RemoteMessage
import PACKAGE_NAME.ContenedorPrincipal
import PACKAGE_NAME.R
import PACKAGE_NAME.general.General
import java.text.SimpleDateFormat
import java.util.*
//import java.util.concurrent.atomic.AtomicInteger

class ServicioNotificaciones: FirebaseMessagingService()
{
    //private val c = AtomicInteger(0)

    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        super.onMessageReceived(remoteMessage)

        try{
            val uniqueID = Integer.parseInt(SimpleDateFormat("ddHHmmss",  Locale.getDefault()).format(Date()))

            val mNotificationManager: NotificationManager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                val notificationChannel = NotificationChannel(
                    "notificationChannelID",
                    "notificationChannelName",
                    NotificationManager.IMPORTANCE_HIGH)

                mNotificationManager.createNotificationChannel(notificationChannel)
            }


            val mBuilder: NotificationCompat.Builder = NotificationCompat.Builder(applicationContext, "notify_001")
            val ii = Intent(applicationContext, ContenedorPrincipal::class.java)
            val pendingIntent = PendingIntent.getActivity(applicationContext, 0, ii, 0)

            val bigText = NotificationCompat.BigTextStyle()
            bigText.bigText(remoteMessage.notification?.body ?: "")
            bigText.setBigContentTitle(remoteMessage.notification?.title ?: "")
            bigText.setSummaryText(remoteMessage.notification?.body ?: "")

            mBuilder.setContentIntent(pendingIntent)
            mBuilder.setSmallIcon(R.mipmap.ic_launcher_round)
            mBuilder.setContentTitle(remoteMessage.notification?.title ?: "")
            mBuilder.setContentText(remoteMessage.notification?.body ?: "")
            @Suppress("DEPRECATION")
            mBuilder.priority = Notification.PRIORITY_MAX
            mBuilder.setStyle(bigText)

            val buildedNotification = mBuilder.build()

            //mNotificationManager.notify(c.incrementAndGet(), buildedNotification)
            mNotificationManager.notify(uniqueID, buildedNotification)

            /*Looper.prepare()
            General.mostrarConfirmacion(
                remoteMessage.notification?.title ?: "",
                remoteMessage.notification?.body ?: "",
                AlertDialog.Builder(this)
            )*/
        }
        catch (ex: Exception){
            Log.wtf("onMessageReceivedEX", ex.message.toString())
        }
    }
}

并显示：

   <service
            android:name="PACKAGE_NAME.servicios.ServicioNotificaciones"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
    </service>

编辑2：我最终使它与以下代码一起工作：

                val intent2 = Intent(this, MainActivity::class.java)
            intent2.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
            val pendingintent2 = PendingIntent.getActivity(this, 0, intent2, PendingIntent.FLAG_ONE_SHOT)
            val channelId = "Default"
            val builder = NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(remoteMessage.notification?.title)
                .setContentText(remoteMessage.notification?.body).setAutoCancel(true)
                .setContentIntent(pendingintent2)
            val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                val channel = NotificationChannel(
                    channelId,
                    "Default channel",
                    NotificationManager.IMPORTANCE_DEFAULT
                )
                manager.createNotificationChannel(channel)
            }
            manager.notify(uniqueID, builder.build())

谢谢大家！

Answer 1

您必须使用通知渠道：

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    val notificationChannel = NotificationChannel(
        "notify_001",
        getString(R.string.notification_channel_name),
        NotificationManager.IMPORTANCE_HIGH)

    mNotificationManager.createNotificationChannel(notificationChannel)
}

Answer 2

我看不到您在哪里创建通知通道（因为必须安装Android O）。

Create and Manage Notification Channels

Answer 3

我认为此问题与已发送的通知有关，无法接收通知尝试像这样发送通知

"data": {
  "data_title": "test",
  "data_body" : "test"
 }

Firebase通知未显示在前台

3 个答案: